North-Bound Distribution of Link-State and Traffic Engineering Information Using BGP
RFC 7752, “North-Bound Distribution of Link-State and Traffic Engineering Information Using BGP”, is a Proposed Standard document published in March 2016 by H. Gredler, J. Medved, S. Previdi, A. Farrel, S. Ray. It has since been updated by RFC 9029. It has been obsoleted by RFC 9552 — refer to the newer document for the authoritative version. The canonical text is published by the RFC Editor.
Abstract
In a number of environments, a component external to a network is called upon to perform computations based on the network topology and current state of the connections within the network, including Traffic Engineering (TE) information. This is information typically distributed by IGP routing protocols within the network.
This document describes a mechanism by which link-state and TE information can be collected from networks and shared with external components using the BGP routing protocol. This is achieved using a new BGP Network Layer Reachability Information (NLRI) encoding format. The mechanism is applicable to physical and virtual IGP links. The mechanism described is subject to policy control.
Applications of this technique include Application-Layer Traffic Optimization (ALTO) servers and Path Computation Elements (PCEs).
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 7752 is hosted at rfc-editor.org. Available in TXT,HTML.
- RFC 7751 Kerberos Authorization Data Container Authenticated by Multiple Message Authentication Codes
- RFC 7753 Port Control Protocol Extension for Port-Set Allocation
- RFC 7750 Differentiated Service Code Point and Explicit Congestion Notification Monitoring in the Two-Way Active Measurement Protocol
- RFC 7754 Technical Considerations for Internet Service Blocking and Filtering
- RFC 7749 The "xml2rfc" Version 2 Vocabulary
- RFC 7755 SIIT-DC: Stateless IP/ICMP Translation for IPv6 Data Center Environments
- RFC 7748 Elliptic Curves for Security
- RFC 7756 Stateless IP/ICMP Translation for IPv6 Internet Data Center Environments : Dual Translation Mode